IBM N51 Series User Manual

Symptom/Error FRU/Action
One long and multiple short
beeps.
(For external displays, see
“External Display Self-Test”
on page 464 before
replacing any FRUs.)
1. External Display
2. External Display Power
Cord
3. Backlight Lamp
Assembly
4. LCD Assembly
5. System Board
6. Inverter Card
Multiple short beeps.
(For external displays, see
“External Display Self-Test”
on page 464 before
replacing any FRUs.)
1. External Display
2. External Display Power
Cord
3. Backlight Lamp
Assembly
4. LCD Assembly
5. System Board
6. Inverter Card
Continuous beeps.
(See “Power Systems
Checkout” on page 209
before replacing any FRUs.)
1. System Board
2. Memory Option
Display problems 1. External Display, if
installed
2. External Display Power
Cord
3. LCD Assembly
LCD contrast not adjustable 1. LCD Assembly
2. System Board
Keyboard problems 1. Keyboard
Keypad problems 1. Reseat Cables
2. Keypad
3. Keyboard
4. System Board
External keyboard problems 1. Reseat Cables
2. Keyboard
3. System Board
Printer problems 1. Printer
2. Keyboard
3. System Board
Miscellaneous Symptoms
Symptom/Error FRU/Action
Blank screen
(See “Power Systems
Checkout” on page 209
before replacing any FRUs.)
1. Battery
2. AC Adapter
3. Memory Option
4. System Board
Diagnostic tests hang 1. Battery
2. AC Adapter
3. Memory Option
4. System Board
Blinking cursor only 1. Diskette Drive
2. System Board
Diskette drive bypassed 1. Diskette Drive
ThinkPad 350, PS/Note 425 (2618) 213

IBM N51 Series Specifications

General

Brand	IBM
Model	N51 Series
Category	Laptop
Language	English